NetBSD/acorn26 is the port of NetBSD to ARMv2 and ARMv2a
machines, primarily the Acorn Archimedes, A-series and
R-series systems. These systems pre-date those supported by
NetBSD/arm32 and use an earlier,
incompatible version of the ARM architecture.
acorn26 now uses standard ARM bus space implementation
committed a change
over to using the standard ARM bus_space implementation on
acorn26. This is more flexible than the old acorn26 bus_space,
which means that single read/write operations are slower, but
multi and region operations have the potential to be faster, and
particularly insane podules might be supportable.
new driver sec(4) for the Acorn SCSI Expansion Card
committed a new driver
for the Acorn SCSI Expansion. Unlike asc(4), this driver uses the
board's DMA system, uses the machine-independent WD33C93 driver,
works on NetBSD/acorn26, and doesn't share a name with six other
machine-dependent SCSI drivers. Not tested on acorn32, but it
seems to work tolerably well on an A540.
arm port Xscale optimizations
Steve Woodford announced that he has committed various Xscale
micro-optimizations to the NetBSD/arm ports.
Please see his message
to the port-arm Mailing List for details.
New -current snapshot available
A new -current snapshot based on 2001-12-07 sources is now available
in the NetBSD/arm26 snapshot area of the ftp server.
NetBSD 1.6 was released on
Minimal Econet support
NetBSD-current now includes minimal support for Econet interfaces.
At the moment, there are no protocols implemented on top of Econet, so
its usefulness is rather limited. This will change.
Ben Harris has committed a new bootloader, with support for gzipped
kernels, to NetBSD/arm26. See Ben's announcement in the port-arm26
mail archive for more details.
boot with local root
Ben Harris (bjh21@NetBSD.org) has gotten
support for booting with root on a local disk.
DMA in HCCS SCSI driver
Ben Harris (bjh21@NetBSD.org) has committed
support for the pseudo-DMA facilities of the HCCS SCSI podule.
This gets speed up to 300 KB/s.
Archive of NetBSD/acorn26 news items
Supported System Models
Note that NetBSD/acorn26 requires at least 8 Mb of RAM.
Systems with less memory than this will not currently work.
- Archimedes 305, 310 and 440
- Archimedes 410/1, 420/1 and 440/1 (untested)
- BBC A3000
- Archimedes 540
- R260 and R225 (untested)
- A4 (untested)
- A3010 (untested)
- A4000 (untested)
On new machines:
- On-board IDE interface (wdc) supporting
- On-board serial port (com)
- On-board parallel port